Bitwig Preset Triggered Sidechain
Ducks the volume based on a MIDI Input, where the MIDI is just used for a short trigger. Velocity controls the length of the release, and is easily remapped to whatever range you desire. Trigger length, duck depth, and release curves are also easily adjustable. I'm using it on a Group Track where the MIDI Input comes from a sub-track.
This is a companion discussion topic for the original entry at https://bitwiggers.com/presets/bbb49e7a-d69b-4190-ab6d-fc7a307da808/